Fans of "The Da Vinci Code" know the Knights Templar as a secret society. Still, the story of their tumultuous two centuries in power is more shocking and scandalous than any Hollywood movie. After the king of France targets the Knights Templar, they face imprisonment, torture, and executions; but their legacy endures today. Were the Knights Templar faithful servants of Christ or hedonistic heretics? Follow our team of experts as they go to Jerusalem's Temple Mount, the most bitterly contested sacred site in the world. With the help of DNA tests and a remarkable discovery in the Vatican archives, we reveal the truth about the knights' rise into the world's most powerful military, religious order to their spectacular and sudden fall from grace.